title: Distinct responses to mechanical grinding and hydrostatic pressure in luminescent chromism of tetrathiazolylthiophene.
abstract: Luminescent mechanochromism has been intensively studied in the past few years. However, the difference in the anisotropic grinding and the isotropic compression is not clearly distinguished in many cases, in spite of the importance of this discrimination for the application of such mechanochromic materials. We now report the distinct luminescent responses of a new organic fluorophore, tetrathiazolylthiophene, to these stresses. The multichromism is achieved over the entire visible region using the single fluorophore. The different mechanisms of a blue shift by grinding crystals and of a red shift under hydrostatic pressure are fully investigated, which includes a high-pressure single-crystal X-ray diffraction analysis. The anisotropic and isotropic modes of mechanical loading suppress and enhance the excimer formation, respectively, in the 3D hydrogen-bond network.
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Nagura
authors.forename: Shohei
authors.initials: S
authors.lastname: Saito
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Yusa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamawaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Fujihisa
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Sato
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Shimoikeda
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D006874:Hydrostatic Pressure; D049449:Luminescence; D008958:Models, Molecular; D015394:Molecular Structure; D013050:Spectrometry, Fluorescence; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D013876:Thiophenes